js-joda is an immutable date and time library for JavaScript. It provides a simple, domain-driven and clean API based on the ISO calendar system, which is the de facto world calendar following the proleptic Gregorian rules. js-joda has a lightweight footprint, only 43 kB minified and compressed, no third party dependencies. js-joda is fast. It is about 2 to 10 times faster than other JavaScript da